23. Close view of Morning Glory spillway,
on the Barragem Norte cofferdam site, Itajai river, in Santa
Catarina, Brazil. The spillway got
plugged with vegetative debris (visible on the left side)
during a flood event in December 1982,
and led to the breach of the temporary structure (Photo by V. M. Ponce,
January 1983).

24. Emergency spillways at Itaipu Dam, on the Parana river, along the border between Brazil and Paraguay.